Double-acting pump.



H. HAMILTON.

DGUBLE ACTING PUMP.

APPucmoM FILED JULY 30.19.

Patented Sept. 18, 1917.

2 SHEETSSHEET I.

I: fa): 32/;

zk a:

H HAMiUDN.

DOUBLE AC'HNG HHYIP,

memes HLD suur 30, m4.

Patented Sept. 18, 917.

2 SHEETS-SHEET 2.

J as

M) W? w Z 010 a I. W a Tm 43 f L J W I HATER-Y EAMELTGN, or nrmeaeong mnmua.

DOUBLE-ACTING PUMP.

Specification of Letters Pa teat.

Patented Sept. 18, 191a;

To all whom, 52 may mean.-

Be it kneirii that I, Hmair Hammer, a citizen of the United States, and a resi dent of the eitvef Lebanon, county of Boon and State: of Indiana; have invented certain new and iisefiil llii'proveihents in Double-Acting Pilmps, (if which the following is a specification.

My invention relates to improvements in doubleacting pumps designed for use espe chilly in the pumping of water, and has for its object the production of a pump of this character which em he er improved censtruction and eliicient in operation. @ther objects Will appear hereinafter.

The invention consists in 'ctifrrbinaa tions and arrangements bf parts 'lfereinafter described and claimed.

The invention will be 'bc'st understood by reference to the accompanying forming a part of this specification, and in which,

Fig-oral is'a central vertical section of a pump embodying my invention,

Figs. 2 and 3 are perspective views of parts of the pump detached, and 7 Figs. 4 and 5 are enlarged transrerse sections taken on lines m--m and g y respectively of Fig. 1.

The preferred form of construction as illustrated in the drawings comprises a cylindrical wall 1 in the ends of which are threaded caps 2 and 3 formed at their outer ends with inlet and outlet ports 4 and 5 respectively. Arranged in the ends of member 1 are circular plates or trans verse partitions 6 and 7 Which engage against annular shoulders formed in said ends and locked in position by engagement therewith of the end members '2 and 3.

Arranged centrally in the member 1 a cylinder 8 at the ends of which are arranged heads 9 and 10, said heads being held rigid in operative position by Webs 11 and 12 formed integral with and in- WHIdlY projecting from the plates 6 and 7 respectively.

Mounted for reciprocation in cylinder 8 is a piston 13 which is connected with the lower end of a rod 14. the latter projecting upwardly through the head 10. Web 12 and plate 7 which serve as a bearing therefor, a suitable packing surrounding said stem at the upper side of plate 7 to prevent leakage. In use, the stem 14 extends upwardly to the surface of the ground Where the same is conneyte'rifwith suitable mechanism for imparti'iii reciprocatory movement thereto, as be readily understood. 7

The-members 1 and 8 are relatively of such dimensions as'to result in the formation of an annuiarfspace betwecn'the same, this space seiaguivided by the websli and 12 and longitudinally extending 'diametri'c partitions 15 which cxte'ndbetween the sajacent or inner edges ofsaid webs into independent chambers 16 17; The plate 6 is provided' irith openings 18 andilQwhich coinmu ni ars 'respcctiveiy with the lower endsiof chambers: 16 and 1 7, andthe plate 7 is provided with openingsQO and 21 communicating respectively with the upper ends of said chambers. The openings 18, 19, 20 and 21 are governed by fiap valves 18', 19 20 and 21' respectively, each of said valves comprising a fiefxi'bie body formed of rubher, "leatheror other suitable material which is secure'd in position at one edge by a screw or other suitable fastening 22, a reiniorcing plateifg lbeifig secured to the upper side of each of said valves. 7

The head 10 slithe upper end' o f eylinder 8 is cesarean one side as at to estab lish open congnnmication between said end 0f saidcyiinder and the chamber 16, the plate '9 being correspondingly cut away at 25 in order to establish open communication between the lower end of said cylinder and the chamber 1?.

With a construction as set forth, it will be seen that upon downward movement of the piston 13, (assuming the latter to be at its upper terminal of movement) a suction will be created in the upper end of cylinder 8 and consequently in the chamber 16 which will cause the valve 20 to be drawn tightly to its seat or closing position, and the valve 18 to be flexed upwardly to open position, in order to allow for the entrance of Water from the inlet port 4 which will be drawn up into chamber 16 and the upper end of chamber 8 by reason of the suction created. Upon the return movement of said piston, the water thus drawn into chamber 16 and the upper end of cylinder 8 will be forced by said piston upwardly through the valve .20 which will be moved to open position by the pressure of the water against the under side thereof, the valve 18 being simultaneously moved to closing position by reason of the pressure of the water at the upper side thereof. At the same time, this upward movement of pistbn 13 will tend to create a vacuum in the lower end of cylinder 10 and the chamber 17 whichwillefi'ect closing of valve 21' and opening of valve 19', the valve 19 permitting of the passage of Water into chamber 17 and the lower end of cylinder 9, the water being drawn thereinto by reason of the suction created through the partial vacuum formed, as is readily understood. Upon the return or downward movement of piston 13 the water thus drawn upwardly into chamber 17, and the lower end of cylinder 8, will be forced upwardly through valve 21 which will be opened by L reason of the pressure against the under side thereof, the valve 19 being moved to closing position by this pressure. During the downward movement of the piston the same action as first described with regard to chamber 16 and the upper end of cylinder 8 will take place. Thus, it will be seen that a double-acting pump is provided, that is, one in which water is elevated during both strokes of the piston.

The arrangement is simple and economical in construction and hence may be manufactured at a low cost, and will be found highly eflicient in operation.

While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claim.

Having described my invention what I claim as new and desiretosecure by Letters Patent is:

In a device of the kind described, in combination an outer and an inner cylinder, circular plates supported against the opposite ends of said outer cylinder, and having valve controlled ports, a centrally formed diamctrical web on each circular plate, the central portion of one web providing a sleeve, semi-circular heads formed at right angles upon each web, the inner cylinder being of such length and diameter as to engage the inner sides of said semi-circular heads so as to be supported against vertical displacement within the outer cylinder, :1 pair of longitudinally disposed partitions secured upon the inner side of said outer cylinder at diametrically opposite points therein and having concave faces, said inner cylinder engaging the concave faces of said partitions so as to be held against displace ment and be positioned concentrically in the outer cylinder, a piston moving in said in ner cylinder and a piston rod secured to said piston and projecting through said sleeve.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HARRY HAMILTON.

Witnesses HOMER DALE, GUY DAVIS.

Copies of this patent may he obtained for live cents each, by addressing the Commissioner of Patents, Washington, D. O. 

